- 摘 要
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盧海林1，劉 勇2
(1 武漢工程大學(xué)，武漢430073; 2 瀘州職業(yè)技術(shù)學(xué)院，瀘州646005)[摘要] 進行了2個采用碳纖維布(CFRP)加固的鋼筋混凝土梁和1個對比梁的低周反復(fù)荷載試驗。對試驗構(gòu)件
的破壞形態(tài)、承載力、滯回性能、延性系數(shù)和剛度退化等抗震性能進行了對比分析，結(jié)果表明采用CFRP加固后的RC梁比普通RC梁的滯回曲線更為豐滿，梁延性系數(shù)也由普通RC梁的4.88分別提高到了5.3和6.0，極限承載力分別提高了16.7%和35.7%，采用CFRP加固后的RC梁破壞形態(tài)均為彎曲破壞，表現(xiàn)出良好的延性和耗能能力。同時在整個反復(fù)加載過程中，加固后的梁試件剛度退化較普通鋼筋混凝土梁試件明顯。
[關(guān)鍵詞] CFRP；抗震性能；低周反復(fù)荷載試驗；延性；耗能Experimental study on seismic performance of RC beams strengthened by CFRP
Lu Hailin1, Liu Yong2
(1 Wuhan Institute of Technology, Wuhan 430073, China; 2 Luzhou Vocational and Technical College, Luzhou 646005, China)Abstract: Two RC beams strengthened by CFRP and a contrast beam were tested under reversed cyclic loading to study the effect of seismic retrofit. The destruction of test components by shape, bearing capacity, hysteresis properties, ductility and stiffness degradation coefficient of seismic performance were analyzed and compared. The results show that the hysteresis curve of RC beam strengthened by CFRP is more plentiful than the ordinary RC beam, the ductility coefficient is increased from 4.88 0f the ordinary RC beam t0 5.3 and 6.0, the ultimate bearing capacity is enhanced 16.7% and 35.7% separately, the failure modes of RC beams strengthened with CFRP are bending damage, which shows a good ductility and energy dissipation. At the same time throughout the course of repeated loading, as compared with ordinary RC beam specimen, the stiffness degradation of RC beam with CFRP is more significant.
Keywords: CFRP; seisnuc performance; reversed cyclic loading test; ductility; energy dissipation
